TWENTY-FIFTH ANNUAL REPORT Cif 
The Tropical Research Station collected a number of birds, 
including two fine specimens of the cock-of-the-rock (Rupicola 
rupicola), giving us three individuals of this splendid species. 
At the end of the report of the Director will be found a list 
of the more important arrivals during the year. A total of 
eighty species new to the collection was received, a number far 
greater than in any previous year since 1913. 
On May 29, 1920, the Society sent a shipment to the 
Zoological Gardens of London, including 239 birds of 103 species. 
Keeper James Bailey, of the bird section, was sent from London 
to convey the consignment and landed it in London practically 
without loss. 
On October 6, 1920, an exchange collection was sent to the 
Zoological Gardens of Pretoria, including forty-three birds of 
twenty-nine species. This consignment left on the steamer 
Chinese Prince, in care of Keeper Schluter of the Pretoria 
Gardens. 
Two new installations were completed during the year. 
One is a new cage for blackbirds and grackles, a well-built dome, 
with background of concrete and stone. It occupies the former 
site of the old wooden-framed structures, which had become 
unsightly. The other is a series of twenty-eight individual par- 
rot cages, arranged in three tiers, in the space in the parrot hall 
formerly occupied by cockatoos. These cages are now filled with 
the finest series of lories, parrots and parrakeets ever possessed 
by the Society. Their completion has placed our parrot collec- 
tion on a new footing, which we hope to be able to maintain. 
Among the birds reared in the Park during the year several 
are worthy of special notice. The most interesting is a black 
vulture (Catharista urubu urubu), apparently the first record in 
captivity. The parents occupy a cage in the Eagles’ Aviary. 
The female laid two eggs and hatched two young, but only one 
nestling was reared to maturity. During the height of the breed- 
ing season in the Flying Cage gull colony, our two pairs of lovely 
silver gulls (Bruchigavia novehollandix) nested several times, 
but each time their eggs or young were destroyed by quarrelsome 
neighbors. However, after the other birds had left the rookery, 
a pair of silver gulls, more persistent than the others, nested 
again and this time reared two fine young birds. This certainly 
is the first record for America. Early in the year, a young 
